@class NSString; @protocol CALNTravelEngineDelegate; @interface CALNNullTravelEngine : NSObject <CALNTravelEngine> @property (class, readonly, nonatomic) CALNNullTravelEngine *sharedInstance; @property (weak, nonatomic) id<CALNTravelEngineDelegate> delegate; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; - (void)sendFeedbackForPostingLeaveNowNotificationForEventWithExternalURL:(id)a0; - (void)sendFeedbackForPostingLeaveByNotificationForEventWithExternalURL:(id)a0; - (void)cancelHypothesisRefreshRequestForEventWithExternalURL:(id)a0; - (void).cxx_destruct; - (void)ceaseMonitoringForEventWithExternalURL:(id)a0; - (void)requestHypothesisRefreshAtDate:(id)a0 forEventWithExternalURL:(id)a1; @end